Hi there. I'm a new mac user. Just switched from Windows 7. I have these two external hard drives that i've had over the many years of reformating my Windows computer over and over again. Well in doing this, it has created all these crazy security settings and permission settings. Hooking them up to my new Hackintosh that is running pretty friggin perfectly besides this issue, well everything is now locked on those two hard drives and its all read only. How can I clear the permissions and set them to the new mac OS 10.8.4? Thanks for the help!